Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Porous silicon carbide honeycomb ceramic and preparation method thereof
The invention relates to the field of porous ceramics, and especially to a porous silicon carbide honeycomb ceramic and a preparation method thereof. The honeycomb ceramic is formed by alternately overlapping and combining silicon carbide perforated plates with corrugated geometrical shapes and flat plate shapes, and the pore density of the silicon carbide perforated plates is between 5PPI and 200PPI. The corrugated shape is a triangle, and the vertex angle of the triangle can be in a sharp shape or in a corrugation shape formed by deformation of the triangle and the like. An organic fiber silk screen is coated with slurry and then subjected to hot press molding to form a corrugated plate or a flat plate, the corrugated plate and the flat plate are bonded together in an alternate stacking mode, and then the silicon carbide honeycomb ceramic can be obtained through pyrolysis and reaction siliconizing. The porous silicon carbide honeycomb ceramic obtained by the invention not only keeps the straight channel structure of the existing honeycomb ceramic in the axial direction, but also has a large number of holes in the wall surface of the channel, and has the characteristics of high specific surface area, low pressure drop, uniform temperature field, corrosion resistance, firm coating load and the like.
本发明涉及多孔陶瓷领域，具体为一种多孔碳化硅蜂窝陶瓷及其制备方法。该蜂窝陶瓷为具有波纹几何形状及平板形状的碳化硅多孔板交替叠加组合而成，碳化硅多孔板的孔密度在5PPI～200PPI之间。波纹形状是三角形，三角形顶角可以为尖锐形状，亦可为由三角形变形而来的波纹形状等。本发明中有机纤维丝网经涂覆浆料后热压成型为波纹板或者平板，将波纹板与平板以交替堆垛的方式粘接在一起，再经热解、反应渗硅可得到碳化硅蜂窝陶瓷。本发明得到的多孔碳化硅蜂窝陶瓷不仅在轴向保持现有蜂窝陶瓷的直通道结构，而且在通道壁面上具有大量孔洞，具有高比表面积、低压降、温场均匀、耐腐蚀、涂层负载牢固等特点。
Porous silicon carbide honeycomb ceramic and preparation method thereof
The invention relates to the field of porous ceramics, and especially to a porous silicon carbide honeycomb ceramic and a preparation method thereof. The honeycomb ceramic is formed by alternately overlapping and combining silicon carbide perforated plates with corrugated geometrical shapes and flat plate shapes, and the pore density of the silicon carbide perforated plates is between 5PPI and 200PPI. The corrugated shape is a triangle, and the vertex angle of the triangle can be in a sharp shape or in a corrugation shape formed by deformation of the triangle and the like. An organic fiber silk screen is coated with slurry and then subjected to hot press molding to form a corrugated plate or a flat plate, the corrugated plate and the flat plate are bonded together in an alternate stacking mode, and then the silicon carbide honeycomb ceramic can be obtained through pyrolysis and reaction siliconizing. The porous silicon carbide honeycomb ceramic obtained by the invention not only keeps the straight channel structure of the existing honeycomb ceramic in the axial direction, but also has a large number of holes in the wall surface of the channel, and has the characteristics of high specific surface area, low pressure drop, uniform temperature field, corrosion resistance, firm coating load and the like.
本发明涉及多孔陶瓷领域，具体为一种多孔碳化硅蜂窝陶瓷及其制备方法。该蜂窝陶瓷为具有波纹几何形状及平板形状的碳化硅多孔板交替叠加组合而成，碳化硅多孔板的孔密度在5PPI～200PPI之间。波纹形状是三角形，三角形顶角可以为尖锐形状，亦可为由三角形变形而来的波纹形状等。本发明中有机纤维丝网经涂覆浆料后热压成型为波纹板或者平板，将波纹板与平板以交替堆垛的方式粘接在一起，再经热解、反应渗硅可得到碳化硅蜂窝陶瓷。本发明得到的多孔碳化硅蜂窝陶瓷不仅在轴向保持现有蜂窝陶瓷的直通道结构，而且在通道壁面上具有大量孔洞，具有高比表面积、低压降、温场均匀、耐腐蚀、涂层负载牢固等特点。
Porous silicon carbide honeycomb ceramic and preparation method thereof
一种多孔碳化硅蜂窝陶瓷及其制备方法
YANG ZHENMING (Autor:in) / TIAN CHONG (Autor:in) / GAO YONG (Autor:in) / ZHANG JINGSONG (Autor:in)
20.08.2021
Patent
Elektronische Ressource
Chinesisch
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